Signal processing circuit for audio apparatus

Details Signal processing circuit for audio apparatus Signal processing circuit for audio apparatus

1994-04-14

1995-03-07

Kuntz, Curtis

Electrical audio signal processing systems and devices

Including amplitude or volume control

Automatic

333 14, H03G 300, H03G 700

Patent

active

053965620

ABSTRACT:
A signal processing circuit for an audio apparatus has a variable gain amplifier whose gain is varied in accordance with a gain controlling signal supplied thereto. The signal processing circuit comprises a gain setting section having a plurality of tables of input-output characteristics according to a level of loudness selected by a user. The characteristics being for the variable gain amplifier. A table selecting section selects a corresponding one of the plurality of input-output characteristics in accordance with the selected level of loudness. The table selecting section supplies the corresponding input-output characteristic to the variable gain amplifier so as to set the variable gain amplifier for a gain corresponding to the input-output characteristic.

REFERENCES:
patent: 4271499 (1981-06-01), Leveque
patent: 4752960 (1988-06-01), Scholz
patent: 4947133 (1990-08-01), Thomas

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